There are a lot of pretty girls that look so much better in manga form. Anime-exclusive....I'd have to say Hoshina Utau from Shugo Chara. She is gorgeous. lol Even makes GIRLS blush when they see her. XD

Most of my favorite anime girls are just "cute". Cute like "little-sister" cute. But Utau is definitely "beautiful". :3

Full Moon looks beautiful depending on the animation. XD

It's all about detail in her hair and eyes.
But anime has followed the motto in real life: "If you're a popular singer, you HAVE to be beautiful!!" XD